Mobile QR Code QR CODE : Journal of the Korean Society of Civil Engineers

  1. ๊ฒฝ๋ถ๋Œ€ํ•™๊ต ํ† ๋ชฉ๊ณตํ•™๊ณผ ๊ต์ˆ˜ (Kyungpook National University)


์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ, ์‘๋ ฅ๊ต๋ž€์˜์—ญ, ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ, ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ
Structural concrete, Disturbed region, Strut-tie model, Computer graphics program

  • 1. ์„œ ๋ก 

  • 2. ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ• ์ ์šฉ ๋ถ„์•ผ ๋ฐ ์ ˆ์ฐจ

  • 3. ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ

  •   3.1 ํ™”๋ฉด๊ตฌ์„ฑ ๋ฐ ๋ฉ”๋‰ด์‹œ์Šคํ…œ

  •   3.2 ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„์˜ ๊ฒฐ์ • ๋ฐ ์‹œ๊ฐํ™”

  •   3.3 ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ํ˜•์„ฑ

  •   3.4 ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„ ๊ฒฐ์ •

  •   3.5 ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์น˜์ˆ˜ํ™”

  •   3.6 ๋…๋ฆฝ ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„๊ฒ€ํ† 

  • 4. ๋‚ดํ•˜๋ ฅ ๊ฒ€ํ† ๋ฅผ ํ†ตํ•œ ์ ์šฉ์„ฑ ๊ฒ€์ฆ

  • 5. ๊ฒฐ ๋ก 

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1. ์„œ ๋ก 

ํ˜„ํ–‰ ์„ธ๊ณ„ ์ฃผ์š” ์„ค๊ณ„๊ธฐ์ค€์„œ๋Š” ์‘๋ ฅ๊ต๋ž€์˜์—ญ(D-์˜์—ญ)์„ ๊ฐ–๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์„ค๊ณ„๋ฅผ ์œ„ํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์„ ์ฑ„ํƒํ•˜๊ณ  ์žˆ๋‹ค. ์ด ๋ฐฉ๋ฒ•์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ผ๋ถ€๋ถ„ ๋˜๋Š” ์ „์ฒด๋ฅผ ์••์ถ•๋ ฅ์„ ์ „๋‹ฌํ•˜๋Š” ์ŠคํŠธ๋Ÿฟ, ์ธ์žฅ๋ ฅ์„ ์ „๋‹ฌํ•˜๋Š” ํƒ€์ด, ๊ทธ๋ฆฌ๊ณ  ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด๊ฐ€ ๋งŒ๋‚˜๋Š” ์ ˆ์ ์˜์—ญ ๋“ฑ์œผ๋กœ ๊ตฌ์„ฑํ•œ๋‹ค. ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์€ ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด๋กœ ๊ตฌ์„ฑํ•œ ์—ญํ•™์  ํž˜์˜ ๊ฒฝ๋กœ๋ฅผ ์‹œ๊ฐํ™”ํ•˜๋ฉฐ, ์ฃผ์ฒ ๊ทผ์˜ ์–‘, ์ฃผ์ฒ ๊ทผ์˜ ๋ฐฐ์น˜์œ„์น˜, ๊ทธ๋ฆฌ๊ณ  ์ฝ˜ํฌ๋ฆฌํŠธ ์••์ถ•์‘๋ ฅ์˜ ํฌ๊ธฐ ๋“ฑ์„ ๊ฒฐ์ •ํ•  ๋ฟ ์•„๋‹ˆ๋ผ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ ๋‚ด์˜ ํž˜ ์ „๋‹ฌ๋ฉ”์ปค๋‹ˆ์ฆ˜์— ๋Œ€ํ•œ ์„ค๊ณ„์ž์˜ ์ดํ•ด๋„๋ฅผ ๋†’์—ฌ ์ต์ˆ™ํ•˜์ง€ ์•Š์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์„ค๊ณ„ ์ƒํ™ฉ์„ ๋‹ค๋ฃจ๋Š” ๋Šฅ๋ ฅ์„ ํ–ฅ์ƒ์‹œํ‚จ๋‹ค.

๊ทธ๋Ÿฌ๋‚˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์— ์˜ํ•œ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ํ•ด์„ ๋ฐ ์„ค๊ณ„๊ณผ์ •์€ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„์กฐ๊ฑด์„ ๋งŒ์กฑ์‹œํ‚ค๋Š” ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ํ˜•์„ฑ, ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„ ๊ฒฐ์ •, ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ํ•„์š”๋‹จ๋ฉด์ ๊ณผ ๋‹จ๋ฉด๋ ฅ์˜ ๊ฒฐ์ •, ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ ๊ฒฝ๊ณ„๋ฉด์˜ ์ตœ๋Œ€๋‹จ๋ฉด์  ๊ฒฐ์ •, ๊ทธ๋ฆฌ๊ณ  ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„์กฐ๊ฑด์˜ ๊ฒ€ํ†  ๋“ฑ์œผ๋กœ ์ธํ•œ ์—ฌ๋Ÿฌ ๋ฐ˜๋ณต์ ์ธ ์ˆ˜์น˜ํ•ด์„๊ณผ์ •, ๋งŽ์€ ๋„์‹์  ๊ณ„์‚ฐ๊ณผ์ •, ๊ทธ๋ฆฌ๊ณ  ์—ฌ๋Ÿฌ ๋‹จ๊ณ„์—์„œ์˜ ์„ค๊ณ„์ž์˜ ์ฃผ๊ด€์ ์ธ ํŒ๋‹จ ๋“ฑ์„ ํ•„์š”๋กœ ํ•˜๋Š” ๋‹จ์ ์ด ์žˆ๋‹ค. ์ด์™€ ๊ฐ™์€ ๋‹จ์ ์„ ๊ทน๋ณตํ•˜๊ณ  ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์˜ ๊ฐœ๋…์— ๋”ฐ๋ผ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์„ค๊ณ„๋ฅผ ํšจ์œจ์ ์œผ๋กœ ์ˆ˜ํ–‰ํ•˜๊ธฐ ์œ„ํ•œ ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์˜ ๊ฐœ๋ฐœ์— ๊ด€ํ•œ ๋ช‡๋ช‡ ์—ฐ๊ตฌ๊ฐ€ ์ˆ˜ํ–‰๋˜์—ˆ๋‹ค. Alshegeir and Ramirez (1992), Mish et al. (1995), Yun and Park (1995)๋Š” ์ฒ ๊ทผ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ๋ฅผ ๋ฌด๊ทผ์ฝ˜ํฌ๋ฆฌํŠธ๋กœ ๊ฐ„์ฃผํ•œ ํ›„ ์œ ํ•œ์š”์†Œํ•ด์„์œผ๋กœ๋ถ€ํ„ฐ ๊ตฌํ•œ ํƒ„์„ฑ์‘๋ ฅํ๋ฆ„์„ ์‹œ๊ฐํ™”ํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ๋Š” ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์„ ๊ฐœ๋ฐœํ•˜์˜€์œผ๋ฉฐ, Yun (2000)์€ ๋ฌด๊ทผ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ๋น„ํƒ„์„ฑ ์œ ํ•œ์š”์†Œํ•ด์„์œผ๋กœ๋ถ€ํ„ฐ ๊ตฌํ•œ ์‘๋ ฅํ๋ฆ„์„ ์‹œ๊ฐํ™”ํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ํ˜•์„ฑํ•˜๊ณ , ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์ž์ฒด์˜ ๋น„ํƒ„์„ฑ ๊ตฌ์กฐํ•ด์„์„ ์ˆ˜ํ–‰ํ•˜๋ฉฐ, ๋˜ํ•œ ํŒŒ๊ดด๋ฉ”์ปค๋‹ˆ์ฆ˜์˜ ๋ฐœ์ƒ์—ฌ๋ถ€๋ฅผ ํ†ตํ•ด ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„์กฐ๊ฑด์„ ๊ฒ€ํ† ํ•˜์—ฌ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๊ฐ•๋„ํ•ด์„๊ณผ ๊ทนํ•œ์„ค๊ณ„๋ฅผ ๋™์‹œ์— ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๋Š” ์œ ๋‹‰์Šค ๊ธฐ๋ฐ˜ ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ NL-STM์„ ๊ฐœ๋ฐœํ•˜์˜€๋‹ค. Tjhin and Kuchma (2002)๋Š” ์„ค๊ณ„์ž์˜ ๊ฒฝํ—˜๊ณผ ํŒ๋‹จ์— ๋”ฐ๋ผ ์ •์ • ํŠธ๋Ÿฌ์Šค ๊ตฌ์กฐ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ํ˜•์„ฑํ•˜๊ณ , ํ˜•์„ฑํ•œ ๋ชจ๋ธ์˜ ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ๋‹จ๋ฉด์ ์„ ์„ค๊ณ„๊ธฐ์ค€์˜ ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ์œ ํšจ๊ฐ•๋„ ๊ฐ’์„ ์ž…๋ ฅํ•˜์—ฌ ๊ตฌํ•˜๊ณ , ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ์„ ์ง€์••ํŒ์˜ ํฌ๊ธฐ ๋ฐ ์„ค๊ณ„๊ธฐ์ค€์˜ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„ ๊ฐ’์„ ์ž…๋ ฅํ•˜์—ฌ ํ˜•์„ฑํ•œ ํ›„ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๊ฐ ์š”์†Œ์˜ ๊ฐ•๋„์กฐ๊ฑด์„ ๊ฒ€ํ† ํ•  ์ˆ˜ ์žˆ์€ ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์„ ๊ฐœ๋ฐœํ•˜์˜€๋‹ค.

๊ทธ๋Ÿฌ๋‚˜, ์ด๋“ค ์„ ํ–‰ ์—ฐ๊ตฌ๋Š” ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ํ˜•์„ฑ์„ ์œ„ํ•œ ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„์˜ ๊ฒฐ์ • ์‹œ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์— ๋ฐฐ์น˜๋  ์ฒ ๊ทผ์˜ ์˜ํ–ฅ์„ ๊ณ ๋ คํ•˜์ง€ ๋ชปํ•˜๋ฉฐ, ๋ถ€์ •์ • ํŠธ๋Ÿฌ์Šค ๊ตฌ์กฐ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ํ˜•์„ฑํ•  ๊ฒฝ์šฐ ๊ฐ ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ํ•„์š”๋‹จ๋ฉด์ ๊ณผ ๋‹จ๋ฉด๋ ฅ์„ ํ•ฉ๋ฆฌ์ ์ธ ๋ฐฉ๋ฒ•์„ ํ†ตํ•˜์—ฌ ๊ฒฐ์ •ํ•˜์ง€ ๋ชปํ•˜๋ฉฐ, ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ž์ค‘์ด ํ•ด์„ ๋ฐ ์„ค๊ณ„์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ ์ž๋™์ ์œผ๋กœ ๊ณ ๋ คํ•˜์ง€ ๋ชปํ•˜๋ฉฐ, ๊ฒฝ์‚ฌ์ง€์ , ์ง€๋ฐ˜ ๋˜๋Š” ๋ง๋š์˜ ์˜ํ–ฅ, ๊ทธ๋ฆฌ๊ณ  ์ง€์ ์˜ ์ดˆ๊ธฐ๋ณ€์œ„ ๋“ฑ์˜ ๋‹ค์–‘ํ•œ ๊ฒฝ๊ณ„์กฐ๊ฑด์„ ํ‰๋ฉด๊ณ ์ฒด ๋ฐ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์ž์ฒด์˜ ๊ตฌ์กฐํ•ด์„ ์‹œ ๊ณ ๋ คํ•˜์ง€ ๋ชปํ•œ๋‹ค. ๋˜ํ•œ ์—ฌ๋Ÿฌ ์„ค๊ณ„๋ณ€์ˆ˜๋“ค์˜ ์˜ํ–ฅ์„ ์ˆ˜์น˜ํ•ด์„์ ์ธ ๋ฐฉ๋ฒ•์„ ํ†ตํ•ด ์„ธ์‹ฌํ•˜๊ฒŒ ๊ณ ๋ คํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„๋ฅผ ์ •ํ™•ํ•˜๊ฒŒ ๊ฒฐ์ •ํ•  ์ˆ˜ ์žˆ๋Š” ๋ฐฉ๋ฒ•์„ ์ ‘๋ชฉ์‹œํ‚ค์ง€ ์•Š์•„ ์„ค๊ณ„๊ธฐ์ค€์„œ ์ด์™ธ์˜ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„๋ฅผ ์‚ฌ์šฉํ•  ์ˆ˜ ์—†์œผ๋ฉฐ, ์‹ค์ œ์˜ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์—์„œ ๋‚˜ํƒ€๋‚˜๋Š” ๋ณ‘๋ชจ์–‘, ๋ถ€์ฑ„๋ชจ์–‘, ๋ณ€๋‹จ๋ฉด ํ”„๋ฆฌ์ฆ˜ ๋“ฑ์˜ ์ŠคํŠธ๋Ÿฟ ๋‹จ๋ฉดํ˜•์ƒ์„ ๋ชจ๋‘ ๋“ฑ๋‹จ๋ฉด ํ”„๋ฆฌ์ฆ˜์œผ๋กœ ํ‘œํ˜„ํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„๋ฅผ ์ •ํ™•ํ•˜๊ฒŒ ๊ฒ€ํ† ํ•  ์ˆ˜ ์—†๋‹ค. ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์‘๋ ฅ๊ต๋ž€์˜์—ญ์„ ๊ฐ–๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ํŒŒ๊ดด ์›์ธ์˜ ๋ถ„์„, ์ฒ˜์ง, ๋ณ€ํ˜•๋ฅ , ํž˜ ์ „๋‹ฌ ๋ฉ”์ปค๋‹ˆ์ฆ˜์˜ ๋ณ€ํ™” ๋“ฑ์„ ํฌํ•จํ•œ ๋น„์„ ํ˜• ๊ฑฐ๋™์˜ ๋ถ„์„, ๊ทธ๋ฆฌ๊ณ  ํŒŒ๊ดด๊ฐ•๋„์˜ ํ‰๊ฐ€ ๋“ฑ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„์„ ์œ„ํ•œ ๊ธฐ๋Šฅ์ด ์—†์œผ๋ฉฐ, ํ˜„ ์„ค๊ณ„๊ธฐ์ค€์„œ์˜ ์ ˆ์ ์˜์—ญ ๊ฐ•๋„ ๊ทœ์ •์˜ ๋ชจํ˜ธ์„ฑ ๋ฐ ๋ถ€์ •ํ™•์„ฑ์„ ๋Œ€์‹ ํ•˜๊ธฐ ์œ„ํ•œ ๋ณ„๋„์˜ ์ ˆ์ ์˜์—ญ์˜ ์ •๋ฐ€ ๊ฐ•๋„๊ฒ€ํ†  ๋ฐฉ๋ฒ•์ด ๋‚ด์žฌ๋˜์–ด์žˆ์ง€ ์•Š์œผ๋ฉฐ, ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์„ค๊ณ„๋ฅผ ์œ„ํ•œ ์ˆ˜์น˜ํ•ด์„ ๋ฐ ๊ทธ๋ž˜ํ”ฝ ๊ธฐ๋Šฅ์ด ์ œํ•œ์ ์ด๋ผ ์‚ฌ์šฉ์ž ํŽธ์˜์ค‘์‹ฌ์„ ์œ„ํ•œ ๊ธฐ๋Šฅ์ด ๋ถ€์กฑํ•˜๋‹ค.

์ด ์—ฐ๊ตฌ์—์„œ๋Š” ์„ ํ–‰์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์ด ์ง€๋‹Œ ๋‹จ์  ๋ฐ ํ•œ๊ณ„๋ฅผ ๊ทน๋ณตํ•˜์—ฌ PC ์œˆ๋„์šฐ ์‹œ์Šคํ…œ์—์„œ ๋ชจ๋“  ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„ ๋ฐ ์„ค๊ณ„๋ฅผ ์ „๋ฌธ์ ์ด๋ฉฐ ํšจ์œจ์ ์œผ๋กœ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๋Š” ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์„ ๊ฐœ๋ฐœ, ์ œ์•ˆํ•˜์˜€๋‹ค. ๊ฐœ๋ฐœํ•œ ํ”„๋กœ๊ทธ๋žจ์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๋ชจ๋ธ๋ง ๋ฐ ํ•ด์„/์„ค๊ณ„ ๊ฒฐ๊ณผ๋ฅผ ๊ทธ๋ž˜ํ”ฝ์œผ๋กœ ์ œ๊ณตํ•˜๋Š” ์œ ์ €์ธํ„ฐํŽ˜์ด์Šค๋ฅผ ๊ฐ–๊ณ  ์žˆ์œผ๋ฉฐ, ๋ชจ๋“  ์ข…๋ฅ˜์˜ ๊ฒฝ๊ณ„์กฐ๊ฑด์„ ์†Œํ™”ํ•  ์ˆ˜ ์žˆ๋Š” ํ‰๋ฉด๊ณ ์ฒด ๋ฐ ํ‰๋ฉดํŠธ๋Ÿฌ์Šค์˜ ์„ ํ˜• ๋ฐ ์žฌ๋ฃŒ๋น„์„ ํ˜• ์ˆ˜์น˜ํ•ด์„์„ ์œ„ํ•œ ์œ ํ•œ์š”์†Œํ•ด์„ ํ”„๋กœ๊ทธ๋žจ, ๋ถ€์ •์ • ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ์ถ•๊ฐ•์„ฑ ๊ฒฐ์ •์„ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ, ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ž์ค‘ ๋ฐ ์ฒ ๊ทผ์˜ ์˜ํ–ฅ์„ ์ž๋™์ ์œผ๋กœ ๋ฐ˜์˜ํ•˜๊ธฐ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ, ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ ์œ ํšจ๊ฐ•๋„๋ฅผ ์ž๋™์ ์œผ๋กœ ๊ฒฐ์ •ํ•˜๊ธฐ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ, ๋‹ค์–‘ํ•œ ํ˜•ํƒœ์˜ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ ๊ฒฐ์ •์„ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ, ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„๋ฅผ ์ •๋ฐ€ํ•˜๊ฒŒ ๊ฒ€ํ† ํ•˜๊ธฐ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ ๋“ฑ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„ ๋˜๋Š” ์„ค๊ณ„ ๊ณผ์ •์—์„œ ํ•„์š”ํ•œ ๋ชจ๋“  ํ”„๋กœ๊ทธ๋žจ์„ ํƒ‘์žฌํ•˜๊ณ  ์žˆ๋‹ค. ํ”„๋กœ๊ทธ๋žจ์˜ ๊ทธ๋ž˜ํ”ฝ ์œ ์ €์ธํ„ฐํŽ˜์ด์Šค ํ™˜๊ฒฝ์€ HOOPS (1997) ๊ทธ๋ž˜ํ”ฝ ํŒจํ‚ค์ง€๋ฅผ ์ด์šฉํ•˜์—ฌ ๊ตฌํ˜„๋˜๋ฉฐ, ๊ทธ๋ž˜ํ”ฝ ํ™˜๊ฒฝ์„ ์ ‘๋ชฉ์‹œํ‚จ ์—ฌ๋Ÿฌ ๋‹ค์–‘ํ•œ ๊ธฐ๋Šฅ์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๋ชจ๋ธ๋ง ๋ฐ ํ•ด์„/์„ค๊ณ„์—์„œ ๋›ฐ์–ด๋‚œ ํšจ์œจ์„ฑ๊ณผ ํŽธ์˜์„ฑ์„ ์ œ๊ณตํ•œ๋‹ค. ์ด ๋…ผ๋ฌธ์—์„œ๋Š” ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์— ์žˆ์–ด์„œ์˜ ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์˜ ํ•„์š”์„ฑ๊ณผ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์˜ ๋Œ€ํ‘œ์ ์ธ ๊ธฐ๋Šฅ์„ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์„ค๊ณ„๊ณผ์ •์„ ๋”ฐ๋ผ ๊ฐ„๋žตํ•˜๊ฒŒ ์†Œ๊ฐœํ•˜์˜€๋‹ค.

2. ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ• ์ ์šฉ ๋ถ„์•ผ ๋ฐ ์ ˆ์ฐจ

์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ ํ˜น์€ ๊ตฌ์กฐ๋ฌผ์€ Fig. 1๊ณผ ๊ฐ™์ด B-์˜์—ญ๊ณผ D-์˜์—ญ์ด๋ผ๊ณ  ๋ถˆ๋ฆฌ๋Š” ๋ถ€๋ถ„์œผ๋กœ ๊ตฌ๋ถ„๋  ์ˆ˜ ์žˆ๋‹ค. ๋ณด์—์„œ์˜ B-์˜์—ญ์€ ๋ณด์˜ ์ „๋‹จ๊ฒฝ๊ฐ„์ด ์ปค์„œ ๋ณด ์ž‘์šฉ์— ์˜ํ•˜์—ฌ ํ•˜์ค‘์ด ์ง€์ง€๋˜๋ฉฐ, ๋‹จ๋ฉด ๋ณ€ํ˜•๋ฅ ์ด ์„ ํ˜•์œผ๋กœ ๋˜์–ด ํ‰๋ฉด๋ณด์กด์˜ ๋ฒ•์น™์ด ์„ฑ๋ฆฝ๋˜๋Š” ๋ถ€๋ถ„์„ ๋งํ•œ๋‹ค. D-์˜์—ญ์€ ์ „๋‹จ๊ฒฝ๊ฐ„์ด ์ž‘์•„์„œ ์•„์น˜์ž‘์šฉ์— ์˜ํ•˜์—ฌ ํ•˜์ค‘์ด ์ง€์ง€๋˜๋ฉฐ, ๋ณด ์ด๋ก ์„ ์ ์šฉํ•  ์ˆ˜ ์—†๋Š” ๋ถ€๋ถ„์„ ๋งํ•œ๋‹ค. ์ผ๋ฐ˜์ ์ธ ๊ตฌ์กฐ๋ถ€์žฌ์—์„œ๋Š” ์ง‘์ค‘ํ•˜์ค‘ ๋ฐ ์ง€๋ฐ˜๋ฐ˜๋ ฅ์ด ์ž‘์šฉํ•˜๋Š” ์˜์—ญ, ๋ธŒ๋ž˜ํ‚ท ๋˜๋Š” ๋‚ด๋ฏผ๋ฐ›์นจ, ๋ณด-๊ธฐ๋‘ฅ์˜ ์—ฐ๊ฒฐ๋ถ€, ํ„ฑ์ด์ง„ ๋ณด์˜ ๋‹จ๋ถ€, ๋‹จ๋ฉด์ด๋‚˜ ๋‹จ๋ฉด๋ ฅ์ด ๊ธ‰๋ณ€ํ•˜๋Š” ๊ณณ, ๊ฐœ๊ตฌ๋ถ€๊ฐ€ ์žˆ๋Š” ๋ถ€์žฌ, ํ”„๋ฆฌํ…์…˜ ๋ฐ ํฌ์ŠคํŠธํ…์…˜ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ •์ฐฉ๋ถ€, ๊ทธ๋ฐ–์— ๊ธฐํ•˜ํ•™์  ๋ถˆ์—ฐ์†๋ถ€ ๋“ฑ์ด D-์˜์—ญ์ด๋‹ค. ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์€ ๋ฐ”๋กœ D-์˜์—ญ ๋˜๋Š” ์ด ์˜์—ญ์„ ํฌํ•จํ•˜๋Š” ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์„ค๊ณ„๋ฅผ ํ•ฉ๋ฆฌ์ ์œผ๋กœ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๋Š” ๋ฐฉ๋ฒ•์ด๋‹ค.

Fig. 1.

Examples of B- and D-regions in Structural Concrete (Tjhin and Kuchma, 2002)

Figure_KSCE_37_03_03_F1.jpg

ํ˜„ํ–‰ ์„ธ๊ณ„ ์ฃผ์š” ์„ค๊ณ„๊ธฐ์ค€์„œ์—์„œ ํ—ˆ์šฉํ•˜๊ณ  ์žˆ๋Š” ํƒ„์„ฑํ•ด์„๋ฐฉ๋ฒ•์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๊ท ์—ด ๋ฐœ์ƒ ์ „์˜ ์‘๋ ฅํ๋ฆ„์„ ๋น„๊ต์  ์ •ํ™•ํ•˜๊ฒŒ ์˜ˆ์ธกํ•  ์ˆ˜๋Š” ์žˆ์ง€๋งŒ, ๊ท ์—ด ๋ฐœ์ƒ ํ›„ ์žˆ์„ ์ˆ˜ ์žˆ๋Š” ์‘๋ ฅํ๋ฆ„ ๋ฐ ์žฌ๋ถ„๋ฐฐ๋Š” ์˜ˆ์ธกํ•  ์ˆ˜ ์—†๋‹ค. ๋˜ํ•œ ๋น„ํƒ„์„ฑ ์œ ํ•œ์š”์†Œํ•ด์„๋ฐฉ๋ฒ•์€ ํŒŒ๊ดด์— ์ด๋ฅผ ๋•Œ๊นŒ์ง€์˜ ๋ชจ๋“  ํ•˜์ค‘์— ๋Œ€ํ•œ D-์˜์—ญ์—์„œ์˜ ์‘๋ ฅํ๋ฆ„์„ ์˜ˆ์ธกํ•  ์ˆ˜ ์žˆ์œผ๋‚˜, ์ด ๋ฐฉ๋ฒ•์€ ํŠน๋ณ„ํ•œ ์กฐ์‚ฌ์—ฐ๊ตฌ ๋“ฑ์—๋งŒ ์ ์ ˆํ•˜๋ฉฐ ๋ณดํ†ต์˜ ํ•ด์„ ๋ฐ ์„ค๊ณ„์—๋Š” ๋ถ€์ ์ ˆํ•˜๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์€ ๊ท ์—ด ๋ฐœ์ƒ ์ „์€ ๋ฌผ๋ก ์ด๊ณ , ๊ท ์—ด ๋ฐœ์ƒ ํ›„์—๋„ ๊ตฌ์กฐ๋ถ€์žฌ ๋‚ด๋ถ€์˜ ํ•˜์ค‘์˜ ์žฌ๋ถ„๋ฐฐ๋ฅผ ์˜ˆ์ธกํ•  ์ˆ˜ ์žˆ๋‹ค. ์‘๋ ฅ๊ต๋ž€์ด ์‹ฌํ•œ ๊ทธ๋ฆฌ๊ณ  ๋ณด ์ด๋ก ์„ ์ ์šฉํ•  ์ˆ˜ ์—†๋Š” ๋Œ€๋ถ€๋ถ„์˜ D-์˜์—ญ ๋˜๋Š” ์ด ์˜์—ญ์„ ๊ฐ–๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์„ค๊ณ„๋Š” ๋ฐ˜๋ณต์ ์ธ ์‹œํ–‰์ฐฉ์˜ค ๊ณผ์ •์„ ํ•„์š”๋กœ ํ•˜๋Š” Fig. 2์˜ ์ ˆ์ฐจ์— ๋”ฐ๋ผ ์ˆ˜ํ–‰ํ•œ๋‹ค. ์„ค๊ณ„์ž์˜ ์ฃผ๊ด€์— ๋”ฐ๋ผ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ์ง์ ‘ ์„ ์ •ํ•ด์•ผํ•˜๋Š” ๊ฒƒ๊ณผ ๋ฐ˜๋ณต์ ์ธ ์‹œํ–‰์ฐฉ์˜ค ๊ณผ์ •์„ ํ•„์š”๋กœ ํ•˜๋Š” ๊ฒƒ์€ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์˜ ์‹ค๋ฌด์ ์šฉ์„ ๊ฐ€๋กœ๋ง‰๋Š” ๊ฐ€์žฅ ํฐ ์žฅ์• ์š”์ธ์ด๋ผ ๋ณผ ์ˆ˜ ์žˆ๋‹ค.

Fig. 2.

Strut-tie Model Design Procedure

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3. ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ

3.1 ํ™”๋ฉด๊ตฌ์„ฑ ๋ฐ ๋ฉ”๋‰ด์‹œ์Šคํ…œ

์ด ์—ฐ๊ตฌ์—์„œ ์ œ์•ˆํ•œ ํ”„๋กœ๊ทธ๋žจ์˜ ์ž‘์—…ํ™”๋ฉด์€ Fig. 3(a)์™€ ๊ฐ™์ด ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„/์„ค๊ณ„ ๊ธฐ๋Šฅ์„ ๋ถ€์—ฌํ•˜๋Š” [ํ‰๋ฉด๊ณ ์ฒดํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ, [ํ‰๋ฉดํŠธ๋Ÿฌ์Šคํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ, ๊ทธ๋ฆฌ๊ณ  ์ด๋“ค์˜ ์„ธ๋ถ€๋ฉ”๋‰ด๋“ค๋กœ ๊ตฌ์„ฑ๋œ ๋ฉ”๋‰ด์ฐฝ, ๋ฉ”๋‰ด๋ฅผ ์‹คํ–‰์‹œํ‚ค๋ฉด ๋‚˜ํƒ€๋‚˜๋Š” ์ฐฝ์œผ๋กœ ์„ ํƒ๊ธฐ๋Šฅ๊ณผ ์ž…๋ ฅ๊ธฐ๋Šฅ์„ ์ด์šฉํ•˜์—ฌ ํ•ด์„/์„ค๊ณ„ ๋ชจ๋ธ์˜ ์ •๋ณด๋ฅผ ์ž…๋ ฅํ•˜๋Š” ๋Œ€ํ™”์ฐฝ, ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„/์„ค๊ณ„ ๊ณผ์ •์—์„œ ์ƒ์„ฑ๋˜๋Š” ์ถœ๋ ฅํŒŒ์ผ์˜ ๋‚ด์šฉ์„ ํ™•์ธํ•˜๋Š” ๊ฒฐ๊ณผ์ถœ๋ ฅ์ฐฝ, ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ ํ•ด์„/์„ค๊ณ„ ๋ชจ๋ธ์˜ ๋ชจ๋ธ๋ง๊ณผ ํ•ด์„๊ฒฐ๊ณผ์˜ ๋ถ„์„ ๋ฐ ๊ฐ์ข… ์ •๋ณด๋“ค์„ ๊ทธ๋ž˜ํ”ฝ์œผ๋กœ ๋ณด์—ฌ์ฃผ๋Š” ์ž‘์—…์˜์—ญ์ฐฝ, ์ปค์„œ๊ฐ€ ์œ„์น˜ํ•œ ๊ณณ์˜ ์ขŒํ‘œ๋ฅผ ํ‘œ์‹œํ•˜๋Š” ์ขŒํ‘œํ‘œ์‹œ์ฐฝ ๋“ฑ์„ ํฌํ•จํ•œ ๋ชจ๋‘ 9๊ฐœ์˜ ์ฐฝ์œผ๋กœ ๊ตฌ์„ฑํ•˜์˜€๋‹ค.

ํ”„๋กœ๊ทธ๋žจ์˜ ๋ฉ”๋‰ด์‹œ์Šคํ…œ์€ Fig. 3(b)์™€ ๊ฐ™์ด ํฌ๊ฒŒ [ํ‰๋ฉด๊ณ ์ฒดํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ๊ณผ [ํ‰๋ฉดํŠธ๋Ÿฌ์Šคํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์œผ๋กœ ๋ถ„๋ฅ˜ํ•˜์˜€๋‹ค. [ํ‰๋ฉด๊ณ ์ฒดํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„/์„ค๊ณ„๋ฅผ ์œ„ํ•œ ํ‰๋ฉด์‘๋ ฅ/ํ‰๋ฉด๋ณ€ํ˜•๋ฅ /์ถ•๋Œ€์นญ(์ดํ•˜ ํ‰๋ฉด๊ณ ์ฒด) ์œ ํ•œ์š”์†Œ๋ชจ๋ธ์˜ ๋ชจ๋ธ๋ง ๋ฐ ํ•ด์„์— ํ•„์š”ํ•œ ๋ฉ”๋‰ด๋“ค๋กœ ๊ตฌ์„ฑ๋˜์–ด์žˆ์œผ๋ฉฐ, [ํ‰๋ฉดํŠธ๋Ÿฌ์Šคํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์€ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ํ˜•์„ฑ, ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๊ตฌ์„ฑ์š”์†Œ์˜ ์œ ํšจ๊ฐ•๋„ ๊ฒฐ์ •, ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์น˜์ˆ˜ํ™” ๋“ฑ์— ํ•„์š”ํ•œ ๋ฉ”๋‰ด๋“ค๋กœ ๊ตฌ์„ฑํ•˜์˜€๋‹ค.

Fig. 3.

Window Layout and Menu Systems

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3.2 ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„์˜ ๊ฒฐ์ • ๋ฐ ์‹œ๊ฐํ™”

์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์˜ ์ ์šฉ์— ์žˆ์–ด์„œ ์ค‘์š”ํ•œ ์š”์†Œ๋“ค ์ค‘ ํ•˜๋‚˜๋Š” ๋ฐฐ๊ทผ์ƒ์„ธ๋ฅผ ๊ณ ๋ คํ•˜๋Š” ์ ํ•ฉํ•œ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ์„ ์ •ํ•˜๋Š” ๊ฒƒ์ด๋‹ค. ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์„ ์ • ์‹œ ์‹œ๊ณต์˜ ์šฉ์ด์„ฑ, ๋ถ€์žฌ์˜ ํ‰ํ˜•์„ฑ, ์žฌ๋ฃŒ์˜ ์—ฐ์„ฑ, ๊ทธ๋ฆฌ๊ณ  ๋ถ€์žฌ์˜ ์‚ฌ์šฉ์„ฑ ๋“ฑ์„ ๊ณ ๋ คํ•˜์—ฌ์•ผ ํ•œ๋‹ค. ๋งŽ์€ ๊ฒฝ์šฐ์— ์žˆ์–ด์„œ ๋ถ€์žฌ์˜ ์‹ค์šฉ์„ฑ๊ณผ ๋ถ€์žฌ ์ œ์ž‘์˜ ์šฉ์ดํ•จ์ด ์„ค๊ณ„๋ชจ๋ธ์˜ ์„ ์ •์— ์ค‘์š”ํ•œ ์˜ํ–ฅ์„ ๋ฏธ์นœ๋‹ค. ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์„ ์ •์€ ๊ฐ„๋‹จํ•œ ์„ค๊ณ„์˜ ๊ฒฝ์šฐ์— ์žˆ์–ด์„œ๋Š” ์‰ฝ๋‹ค. ์••์ถ•์‘๋ ฅ์žฅ์„ ๋‚˜ํƒ€๋‚ด๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ์€ ์˜ˆ์ธกํ•œ ๊ท ์—ด์˜ ์ง„ํ–‰๋ฐฉํ–ฅ๊ณผ ํ‰ํ–‰ํ•˜๊ฒŒ ๋ฐฐ์น˜ํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ํƒ€์ด๋Š” ์ผ๋ฐ˜์ ์ธ ๋ฐฐ๊ทผํ˜•ํƒœ๋ฅผ ์ฐธ์กฐํ•˜์—ฌ ๋ฐฐ์น˜ํ•  ์ˆ˜ ์žˆ๋‹ค. ์ด ๋ฐฉ๋ฒ•์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๊ฑฐ๋™ ๋ฐ ์„ค๊ณ„์— ๋Œ€ํ•œ ๊ธฐ๋ณธ์ ์ธ ์ง€์‹๊ณผ ๊ฒฝํ—˜์„ ํ•„์š”๋กœ ํ•œ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ๊ธฐํ•˜ํ•™์  ํ˜•์ƒ, ํ•˜์ค‘์กฐ๊ฑด, ๊ฒฝ๊ณ„์กฐ๊ฑด ๋“ฑ์„ ๋น„๋กฏํ•œ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์„ค๊ณ„์กฐ๊ฑด์ด ๋ณต์žกํ•œ ๊ฒฝ์šฐ๋Š” ๊ตฌ์กฐ๊ฑฐ๋™์— ๋Œ€ํ•œ ์ง€์‹ ๋ฐ ๊ฒฝํ—˜๊ณผ ๋”๋ถˆ์–ด ํ•ด์„์ ์ธ ์ ˆ์ฐจ๊ฐ€ ์ถ”๊ฐ€์ ์œผ๋กœ ํ•„์š”ํ•˜๋‹ค.

์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์„ ์ •์„ ์œ„ํ•œ ๊ฐ€์žฅ ์ผ๋ฐ˜์ ์ธ ๋ฐฉ๋ฒ•์€ ๋‚ด๋ถ€์˜ ์‘๋ ฅํ๋ฆ„์— ๊ธฐ๋ณธ์„ ๋‘๊ณ  ์žˆ๋Š” ํƒ„์„ฑ์‘๋ ฅ๊ฒฝ๋กœ๋ฒ•์ด๋‹ค(Schlaich et al., 1987). ์ด ๋ฐฉ๋ฒ•์€ D-์˜์—ญ ์ž์œ ๋„์˜ ํ‰ํ˜•์„ ๋งŒ์กฑ์‹œํ‚จ ํ›„์— ํ•˜์ค‘ ๋ฐ ๊ฒฝ๊ณ„ ์กฐ๊ฑด์— ๋Œ€ํ•œ ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„์„ ๊ฒฐ์ •ํ•˜๊ณ , ๊ฒฐ์ •ํ•œ ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„์— ๋”ฐ๋ผ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ์„ ์ •ํ•˜๋Š” ๊ฒƒ์ด๋‹ค. 2์ฐจ์›์œผ๋กœ ๊ฐ„์ฃผํ•  ์ˆ˜ ์žˆ๋Š” ๋ชจ๋“  ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„์€ ์ด ์—ฐ๊ตฌ์—์„œ ์ œ์•ˆํ•œ ํ”„๋กœ๊ทธ๋žจ์˜ [ํ‰๋ฉด๊ณ ์ฒดํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์„ ์ด์šฉํ•˜์—ฌ ๊ฒฐ์ •ํ•œ๋‹ค. ์ด ๋ฉ”๋‰ด์‹œ์Šคํ…œ์€ ์ž‘์—…ํ™˜๊ฒฝ์„ค์ • ๊ธฐ๋Šฅ, ๋ชจ๋ธ๊ทธ๋ฆฌ๊ธฐ ๊ธฐ๋Šฅ, ํ™”๋ฉดํŽธ์ง‘ ๊ธฐ๋Šฅ, ์ž๋™๋ฒˆํ˜ธ๋ถ€์—ฌ ๊ธฐ๋Šฅ, ๋ฆฌ๋ชจ๋ธ๋ง ๊ธฐ๋Šฅ, ํ•˜์ค‘/๊ฒฝ๊ณ„์กฐ๊ฑด ์ž…๋ ฅ ๊ธฐ๋Šฅ, ๊ทธ๋ฆฌ๊ณ  2์ฐจ์› ์œ ํ•œ์š”์†Œํ•ด์„ ๊ธฐ๋Šฅ ๋“ฑ์„ ๊ฐ–๋Š” ๋ฉ”๋‰ด๋กœ ๊ตฌ์„ฑํ•˜์˜€๋‹ค. ํ•˜์ค‘/๊ฒฝ๊ณ„์กฐ๊ฑด ์ž…๋ ฅ ๊ธฐ๋Šฅ์—๋Š” ๋Œ€ํ™”์ฐฝ์„ ํ†ตํ•˜์—ฌ ํ‰๋ฉด๊ณ ์ฒด ์œ ํ•œ์š”์†Œ๋ชจ๋ธ์— ์ž‘์šฉํ•˜๋Š” ์™ธ๋ถ€ํ•˜์ค‘์„ ์ง์ ‘ ์ž…๋ ฅํ•˜๋Š” ์„ธ๋ถ€๊ธฐ๋Šฅ, ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ž์ค‘์„ ๊ณ„์‚ฐํ•˜์—ฌ ํ‰๋ฉด๊ณ ์ฒด๋ชจ๋ธ์˜ ์ ˆ์ ์— ์ž๋™์ ์œผ๋กœ ์ž…๋ ฅํ•˜๋Š” ์„ธ๋ถ€๊ธฐ๋Šฅ, ์ฒ ๊ทผ์˜ ์˜ํ–ฅ์„ ๊ตฌ์†๋ ฅ์œผ๋กœ ์น˜ํ™˜ํ•˜์—ฌ ๋ฌด๊ทผ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ํ‰๋ฉด๊ณ ์ฒด ์œ ํ•œ์š”์†Œ๋ชจ๋ธ์˜ ์ ˆ์ ์— ์ž๋™์ ์œผ๋กœ ์ž…๋ ฅํ•˜๋Š” ์„ธ๋ถ€๊ธฐ๋Šฅ, ํžŒ์ง€, ์ˆ˜ํ‰๋กค๋Ÿฌ, ์ˆ˜์ง๋กค๋Ÿฌ, ๊ฒฝ์‚ฌ์ง€์ ์„ ๊ณ ๋ คํ•˜๊ธฐ ์œ„ํ•œ ๊ฒฝ์‚ฌ ๊ฒฝ๊ณ„์กฐ๊ฑด, ์ง€๋ฐ˜ ๋˜๋Š” ๋ง๋š์˜ ์˜ํ–ฅ์„ ๊ณ ๋ คํ•˜๊ธฐ ์œ„ํ•œ ์Šคํ”„๋ง ๊ฒฝ๊ณ„์กฐ๊ฑด, ๊ทธ๋ฆฌ๊ณ  ์ง€์ ์˜ ์ดˆ๊ธฐ๋ณ€์œ„๋ฅผ ๊ณ ๋ คํ•˜๊ธฐ ์œ„ํ•œ ์ดˆ๊ธฐ๋ณ€์œ„ ๊ฒฝ๊ณ„์กฐ๊ฑด ๋“ฑ์„ ๋ถ€์—ฌํ•˜๋Š” ์„ธ๋ถ€๊ธฐ๋Šฅ ๋“ฑ์ด ์žˆ๋‹ค.

์ƒ๊ธฐ์˜ ์—ฌ๋Ÿฌ ๊ธฐ๋Šฅ์„ ์ด์šฉํ•˜์—ฌ ํ‰๋ฉด๊ณ ์ฒด ์œ ํ•œ์š”์†Œ๋ชจ๋ธ์„ ์™„์„ฑํ•œ ํ›„ 2์ฐจ์› ์œ ํ•œ์š”์†Œํ•ด์„์„ ์ˆ˜ํ–‰ํ•œ๋‹ค. ์œ ํ•œ์š”์†Œํ•ด์„ ๊ฒฐ๊ณผ๋Š” ํ…์ŠคํŠธ์™€ ๊ทธ๋ž˜ํ”ฝ์œผ๋กœ ์ถœ๋ ฅํ•˜๋ฉฐ, ํ…์ŠคํŠธ๋กœ๋Š” ๊ฒฐ๊ณผ์ถœ๋ ฅ์ฐฝ์— ๊ฐ ์š”์†Œ์˜ ์••์ถ•์ฃผ์‘๋ ฅ ๊ฐ’, ์ฃผ์‘๋ ฅ ๊ฐ, ์ฃผ์‘๋ ฅ๋น„ ๋“ฑ์ด, ๊ทธ๋ž˜ํ”ฝ์œผ๋กœ๋Š” ์ž‘์—…์˜์—ญ์ฐฝ์— ์••์ถ•์ฃผ์‘๋ ฅ ํ๋ฆ„ ๋ฐ ํฌ๊ธฐ๋ฅผ ์„ ์˜ ๊ธธ์ด์™€ ์ƒ‰๊น”๋กœ ๊ตฌ๋ถ„ํ•˜์—ฌ ์ถœ๋ ฅํ•œ๋‹ค. Fig. 4๋Š” ํ”„๋กœ๊ทธ๋žจ์˜ [ํ‰๋ฉด๊ณ ์ฒดํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์„ ์‚ฌ์šฉํ•˜์—ฌ ๊ฒฐ์ •ํ•œ ์ฒ ๊ทผ์ฝ˜ํฌ๋ฆฌํŠธ ๊นŠ์€ ๋ณด(KCI, 2012)์˜ ์œ ํ•œ์š”์†Œ๋ชจ๋ธ์— ๋Œ€ํ•œ ํƒ„์„ฑ์••์ถ•์ฃผ์‘๋ ฅ ํ๋ฆ„์„ ๋ณด์ธ ๊ฒƒ์ด๋‹ค. ๊ทธ๋ฆผ์˜ ๊ฐ ๊ฒฝ์šฐ์—์„œ ๋‘ ๊ฐœ์˜ ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„์€ ๋ฐฐ์น˜๋˜๋Š” ์ฒ ๊ทผ์˜ ์˜ํ–ฅ์„ ๊ณ ๋ คํ•˜๊ธฐ ์ „๊ณผ ํ›„์˜ ๊ฒƒ์ด๋‹ค. ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์€ ์ฒ ๊ทผ์ด ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„์„ ํฌํ•จํ•œ ์œ ํ•œ์š”์†Œํ•ด์„ ๊ฒฐ๊ณผ์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ Fig. 5์˜ ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ ์ด์šฉํ•˜์—ฌ ๋ฐ˜์˜ํ•˜์˜€๋‹ค.

Fig. 4.

Examples of Principal Compressive Stress Trajectories in Deep Beams with/without Effect of Reinforcing Bars

Figure_KSCE_37_03_03_F4.jpg
Fig. 5.

Algorithm for Considering Effect of Concrete Confinement by Reinforcing Bars

Figure_KSCE_37_03_03_F5.jpg

3.3 ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ํ˜•์„ฑ

์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์„ค๊ณ„๋ฅผ ์œ„ํ•˜์—ฌ ์ฒ ๊ทผ์˜ ์˜ํ–ฅ์„ ๋ฐ˜์˜ํ•œ ํƒ„์„ฑ์ฃผ์‘๋ ฅ ํ๋ฆ„๊ณผ ์ฒ ๊ทผ ๋ฐฐ์น˜ํ˜•ํƒœ๋ฅผ ๊ณ ๋ คํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ํ˜•์„ฑํ•ด์•ผ ํ•œ๋‹ค. ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์—์„œ๋Š” 2์ฐจ์› ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ [ํ‰๋ฉดํŠธ๋Ÿฌ์Šคํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์˜ ์ž‘์—…ํ™˜๊ฒฝ์„ค์ • ๊ธฐ๋Šฅ, ๋ชจ๋ธ๊ทธ๋ฆฌ๊ธฐ ๊ธฐ๋Šฅ, ํ™”๋ฉดํŽธ์ง‘ ๊ธฐ๋Šฅ, ์ž๋™๋ฒˆํ˜ธ๋ถ€์—ฌ ๊ธฐ๋Šฅ, ๋ฆฌ๋ชจ๋ธ๋ง ๊ธฐ๋Šฅ, ํ•˜์ค‘/๊ฒฝ๊ณ„์กฐ๊ฑด ์ž…๋ ฅ ๊ธฐ๋Šฅ ๋“ฑ์„ ์ด์šฉํ•˜์—ฌ ํ˜•์„ฑํ•œ๋‹ค. ๋ชจ๋ธ๊ทธ๋ฆฌ๊ธฐ ๊ธฐ๋Šฅ์—๋Š” ์ŠคํŠธ๋Ÿฟ ๋˜๋Š” ํƒ€์ด ์š”์†Œ์— ํ•ด๋‹นํ•˜๋Š” ์ž„์˜์˜ ์ง์„ ์„ ๊ทธ๋ฆฌ๊ธฐ ์œ„ํ•œ ๋ฉ”๋‰ด, ๊ทธ๋ฆฐ ์„ ์„ ์‚ญ์ œํ•˜๊ธฐ ์œ„ํ•œ ๋ฉ”๋‰ด, ๊ทธ๋ฆฌ๊ณ  ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์ ˆ์  ๋ฐ ์š”์†Œ ๋ฒˆํ˜ธ๊ฐ€ ๋ถ€์—ฌ๋œ ์ƒํƒœ์—์„œ ํŠธ๋Ÿฌ์Šค ์š”์†Œ๋ฅผ ์ถ”๊ฐ€ํ•˜๋Š” ๋ฉ”๋‰ด ๋“ฑ์ด ์žˆ๋‹ค. ๋ฆฌ๋ชจ๋ธ๋ง ๊ธฐ๋Šฅ์—๋Š” ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์ ˆ์  ๋ฐ ์š”์†Œ ๋ฒˆํ˜ธ๊ฐ€ ๋ถ€์—ฌ๋œ ์ƒํƒœ์—์„œ ์š”์†Œ๋ฅผ ์ œ๊ฑฐํ•˜๋Š” ๋ฉ”๋‰ด, ์ ˆ์ ์˜ ์œ„์น˜๋ฅผ ์˜ฎ๊ฒจ์„œ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ํ˜•์ƒ์„ ์ˆ˜์ •ํ•˜๋Š” ๋ฉ”๋‰ด, ๊ทธ๋ฆฌ๊ณ  ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ทผ๋ณธ์ ์ธ ์ˆ˜์ • ๋˜๋Š” ์žฌ์ƒ์„ฑ์„ ์œ„ํ•œ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์ ˆ์  ๋ฐ ์š”์†Œ ๋ฒˆํ˜ธ๋ฅผ ์ œ๊ฑฐํ•˜๋Š” ๋ฉ”๋‰ด ๋“ฑ์ด ์žˆ๋‹ค.

์ƒ๊ธฐ์˜ ๊ธฐ๋Šฅ์„ ์‚ฌ์šฉํ•  ๊ฒฝ์šฐ ์ผ๋ฐ˜์ ์ธ ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ฒ ๊ทผ ํƒ€์ด ๋ฟ ์•„๋‹ˆ๋ผ ํŠน์ˆ˜ํ•œ ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด ์ฆ‰ ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ์˜ ์œ„์น˜์— ์ค‘๋ณต์œผ๋กœ ๋ฐฐ์น˜๋˜๋Š” ์ฒ ๊ทผ ์ŠคํŠธ๋Ÿฟ, ์ฒ ๊ทผ ํƒ€์ด์˜ ์œ„์น˜์— ์ค‘๋ณต์œผ๋กœ ๋ฐฐ์น˜๋˜๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ ํƒ€์ด, ๊ทธ๋ฆฌ๊ณ  ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ตฌ์กฐ์  ์•ˆ์ •์„ ์œ„ํ•ด ์ถ”๊ฐ€๋˜๋Š” ์š”์†Œ ๋“ฑ์„ ์ด์šฉํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ๋‹ค. Fig. 6์€ ํƒ„์„ฑ์••์ถ•์ฃผ์‘๋ ฅ ํ๋ฆ„๊ณผ ์ƒ๊ธฐ ๋ฉ”๋‰ด์‹œ์Šคํ…œ์˜ ๊ธฐ๋Šฅ์„ ์ด์šฉํ•˜์—ฌ ํ˜•์„ฑํ•œ ํฐ ๊ฐœ๊ตฌ๋ถ€๊ฐ€ ์žˆ๋Š” ์ „์ด ๋ณด์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ๋ณด์ธ ๊ฒƒ์ด๋‹ค.

Fig. 6.

Example of Strut-tie Model Developed by Using Present Program

Figure_KSCE_37_03_03_F6.jpg

3.4 ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„ ๊ฒฐ์ •

์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ํ˜•์„ฑํ•œ ํ›„ [ํ‰๋ฉดํŠธ๋Ÿฌ์Šคํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์˜ ์ธ์žฅ/์••์ถ• ์š”์†Œ ํŒŒ์•… ๊ธฐ๋Šฅ์„ ์‚ฌ์šฉํ•˜์—ฌ ์ธ์žฅ(ํƒ€์ด) ๋ฐ ์••์ถ•(์ŠคํŠธ๋Ÿฟ) ์š”์†Œ๋ฅผ ์ฐพ๋Š”๋‹ค. ์ด ๊ธฐ๋Šฅ์€ ๊ฐ ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด ์š”์†Œ๊ฐ€ ๋‹จ์œ„๊ฐ•์„ฑ์„ ๊ฐ–๋Š”๋‹ค๋Š” ๊ฐ€์ • ํ•˜์— ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์ž์ฒด์— ๋Œ€ํ•˜์—ฌ ์„ ํ˜•ํƒ„์„ฑ ์œ ํ•œ์š”์†Œํ•ด์„์„ ์ˆ˜ํ–‰ํ•˜๊ณ , ๊ทธ ํ•ด์„๊ฒฐ๊ณผ๋ฅผ ์‹œ๊ฐํ™”ํ•˜๋Š” ๊ธฐ๋Šฅ์ด๋‹ค. ๋‹ค์Œ์œผ๋กœ, ํ˜•์„ฑํ•œ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ฐ ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ์˜ ๋‹จ๋ฉด์ , ์ฒ ๊ทผ ํƒ€์ด์˜ ๋‹จ๋ฉด๋ ฅ, ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ ๋“ฑ์„ ๊ฒฐ์ •ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์žฌ๋ฃŒํŠน์„ฑ๊ฐ’ ์ž…๋ ฅ ๊ธฐ๋Šฅ์„ ์‚ฌ์šฉํ•˜์—ฌ ์ด๋“ค ์š”์†Œ์˜ ์œ ํšจ๊ฐ•๋„๋ฅผ ๊ฒฐ์ •ํ•œ๋‹ค. ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์„ค๊ณ„ ์‹œ ํƒ€์ด์˜ ์œ ํšจ๊ฐ•๋„๋Š” ์ผ๋ฐ˜์ ์œผ๋กœ ์ฒ ๊ทผ์˜ ํ•ญ๋ณต๊ฐ•๋„๋กœ ์ทจํ•˜๋‚˜, ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„๋Š” ์—ฐ๊ตฌ์ž ๋ฐ ์„ค๊ณ„๊ธฐ์ค€๋งˆ๋‹ค ์„œ๋กœ ๋‹ค๋ฅธ ๊ฐ’์„ ์ œ์•ˆํ•˜๊ณ  ์žˆ๋‹ค. ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์—์„œ๋Š” ์ง€๊ธˆ๊นŒ์ง€ ์ œ์•ˆ๋œ ๋ชจ๋“  ์„ค๊ณ„๊ธฐ์ค€ ๋˜๋Š” ์—ฐ๊ตฌ์ž์˜ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„ ๊ฐ’์„ ์„ ํƒ์ ์œผ๋กœ ์ž…๋ ฅํ•˜์—ฌ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•˜์˜€๋‹ค.

AASHTO LFRD (2010) ์„ค๊ณ„๊ธฐ์ค€์— ์˜ํ•œ ์ŠคํŠธ๋Ÿฟ์˜ ์œ ํšจ๊ฐ•๋„ ๊ฒฐ์ • ์‹œ ์ŠคํŠธ๋Ÿฟ์„ ์ˆ˜์ง์œผ๋กœ ๊ฐ€๋กœ์ง€๋ฅด๋Š” ์ฒ ๊ทผ์˜ ๋ณ€ํ˜•๋ฅ ์„ ์‚ฐ์ •ํ•ด์•ผ ํ•œ๋‹ค. ๋‹จ์ˆœํ•œ ์ •์ • ํŠธ๋Ÿฌ์Šค ๊ตฌ์กฐ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ฒฝ์šฐ ์ฒ ๊ทผ์˜ ๋ณ€ํ˜•๋ฅ ์€ ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ๊ฐ•์„ฑ์— ๋ฌด๊ด€ํ•˜๊ฒŒ ์‚ฐ์ •ํ•  ์ˆ˜ ์žˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์ผ๋ฐ˜์ ์ธ ๋ถ€์ •์ • ํŠธ๋Ÿฌ์Šค ๊ตฌ์กฐ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ฒฝ์šฐ ์ฒ ๊ทผ์˜ ๋ณ€ํ˜•๋ฅ ์€ ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ๊ฐ•์„ฑ์— ๋”ฐ๋ผ ๋ณ€ํ•œ๋‹ค. ๋”ฐ๋ผ์„œ ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ๊ฐ•์„ฑ ๊ฒฐ์ •์„ ์œ„ํ•œ ์ตœ์ ํ™” ๊ธฐ๋ฒ•์˜ ๋ฐ˜๋ณต์ ์ธ ๊ตฌ์กฐํ•ด์„ ๋‹จ๊ณ„๋งˆ๋‹ค ์ฒ ๊ทผ์˜ ๋ณ€ํ˜•๋ฅ ์„ ๋ฐ˜๋ณต์ ์œผ๋กœ ์‚ฐ์ •ํ•ด์•ผ ํ•œ๋‹ค. ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์€ ๋ชจ๋“  ๊ฒฝ์šฐ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์—์„œ ์ฒ ๊ทผ์˜ ๋ณ€ํ˜•๋ฅ ์„ ์ •ํ™•ํžˆ ๊ตฌํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ์˜ ์œ ํšจ๊ฐ•๋„๋ฅผ ์ž๋™์ ์œผ๋กœ ์‚ฐ์ •ํ•  ์ˆ˜ ์žˆ๋Š” ํ”„๋กœ๊ทธ๋žจ์„ ํƒ‘์žฌํ•˜๊ณ  ์žˆ๋‹ค.

์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์€ ์ˆ˜์น˜ํ•ด์„์  ๋ฐฉ๋ฒ•์„ ํ†ตํ•ด ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„๋ฅผ ๊ฐ€์žฅ ์ •ํ™•ํ•˜๊ณ  ์ผ๊ด€์„ฑ ์žˆ๊ฒŒ ๊ฒฐ์ •ํ•œ๋‹ค๊ณ  ์•Œ๋ ค์ง„ Yun (2005, 2010)์˜ ๋ฐฉ๋ฒ•์œผ๋กœ๋„ ๊ฒฐ์ •ํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•˜์˜€๋‹ค. ๋˜ํ•œ ๊ทธ์˜ ๋ฐฉ๋ฒ•์— ์ ์šฉ๋œ ๊ฐœ๋…์„ ํ™•์žฅํ•˜์—ฌ ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ์˜ ์ข…์ถ•๋ฐฉํ–ฅ ๊ธธ์ด์— ๋”ฐ๋ฅธ ๋ชจ๋“  ์œ„์น˜์—์„œ์˜ ์œ ํšจ๊ฐ•๋„๋ฅผ ๊ฒฐ์ •ํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•˜์˜€์œผ๋ฉฐ, ์ด๋ฅผ ํ†ตํ•˜์—ฌ ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ์˜ ์ข…์ถ•๊ธธ์ด ๋ฐฉํ–ฅ์˜ ๋‹จ๋ฉดํ˜•์ƒ์ด ๋ณ‘๋ชจ์–‘, ๋ถ€์ฑ„๋ชจ์–‘, ๋ณ€๋‹จ๋ฉด ํ”„๋ฆฌ์ฆ˜ ๋“ฑ์œผ๋กœ ๋‚˜ํƒ€๋‚  ์ˆ˜ ์žˆ๋„๋ก ํ•˜์˜€๋‹ค. Fig. 7์€ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„ ๊ฒฐ์ •๊ณผ์ •์„ ๋ณด์ธ ๊ฒƒ์ด๋‹ค. ๊ทธ์˜ ๋ฐฉ๋ฒ•์€ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์ด ์œ„์น˜ํ•œ ๊ณณ์˜ ์‘๋ ฅ ์ƒํƒœ, ์ŠคํŠธ๋Ÿฟ ๊ธธ์ด์˜ ์˜ํ–ฅ, ์ŠคํŠธ๋Ÿฟ๊ณผ ์••์ถ•์ฃผ์‘๋ ฅ ํ๋ฆ„๊ณผ์˜ ๋ถˆ์ผ์น˜์˜ ์˜ํ–ฅ, ์ฝ˜ํฌ๋ฆฌํŠธ ์••์ถ•๊ฐ•๋„์˜ ์˜ํ–ฅ ๋“ฑ๊ณผ Fig. 5์˜ ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ ํ†ตํ•œ ์ฒ ๊ทผ์— ์˜ํ•œ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์†์˜ ์˜ํ–ฅ, ์ฒ ๊ทผ์˜ ์ •์ฐฉํ˜•ํƒœ์— ๋”ฐ๋ฅธ ๊ตญ๋ถ€์˜์—ญ์˜ ์‘๋ ฅ ์ƒํƒœ ๋“ฑ์„ ํ•ฉ๋ฆฌ์ ์œผ๋กœ ๋ฐ˜์˜ํ•˜๋Š” ์žฅ์ ์ด ์žˆ์œผ๋‚˜, ๋‹ค์†Œ ๋ณต์žกํ•˜๊ณ  ๋ฐ˜๋ณต์ ์ธ ์ˆ˜์น˜ํ•ด์„ ๊ณผ์ •์œผ๋กœ ์ธํ•ด ์‹ค์šฉ์„ฑ ์ธก๋ฉด์—์„œ ํ•œ๊ณ„๊ฐ€ ์žˆ๋‹ค๋Š” ์ง€์ ์ด ์žˆ๋‹ค. ๊ทธ์˜ ๋ฐฉ๋ฒ•์— ๋Œ€ํ•œ ์ƒ์„ธํ•œ ์„ค๋ช…์€ ์ฐธ๊ณ ๋ฌธํ—Œ์œผ๋กœ ๋Œ€์น˜ํ•œ๋‹ค.

Fig. 7.

Procedure for Determination of Effective Strength of Nodal Zone

Figure_KSCE_37_03_03_F7.jpg

3.5 ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์น˜์ˆ˜ํ™”

์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์น˜์ˆ˜ํ™”๋ž€ ์„ค๊ณ„ํ•˜์ค‘์„ ๋ฐ›๋Š” ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์—์„œ ๋ชจ๋“  ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ํ•„์š”๋‹จ๋ฉด์ ์„ ๊ฒฐ์ •ํ•˜๊ณ , ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„์— ๋Œ€ํ•œ ์กฐ๊ฑด์˜ ๊ฒ€ํ† ๋ฅผ ํ†ตํ•ด ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ธฐํ•˜ํ•™์  ์ ํ•ฉ์กฐ๊ฑด์„ ๊ฒ€ํ† ํ•˜๊ณ , ๊ทธ๋ฆฌ๊ณ  ์„ ์ •ํ•œ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์„ ์ด์šฉํ•˜์—ฌ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ƒ์„ธ์„ค๊ณ„๋ฅผ ์ˆ˜ํ–‰ํ•˜๋Š” ๊ฒƒ์„ ๋งํ•œ๋‹ค. ์—ฌ๊ธฐ์„œ, ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ธฐํ•˜ํ•™์  ์ ํ•ฉ์กฐ๊ฑด์„ ๊ฒ€ํ† ํ•œ๋‹ค๋Š” ๊ฒƒ์€ ์ฐจ์›ํ™”์‹œํ‚จ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์—์„œ ์ŠคํŠธ๋Ÿฟ์˜ ํ•„์š”๋‹จ๋ฉด์ ์ด ์ฃผ๋ณ€์˜ ํ‰ํ–‰ํ•œ ๋˜๋Š” ํ‰ํ–‰์— ๊ฐ€๊นŒ์šด ์ŠคํŠธ๋Ÿฟ์˜ ํ•„์š”๋‹จ๋ฉด์ ๊ณผ ์ค‘์ฒฉ๋˜๋Š”์ง€ ๊ทธ๋ฆฌ๊ณ  ์–ด๋А ํ•œ ์š”์†Œ์˜ ํ•„์š”๋‹จ๋ฉด์ ์ด ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๊ธฐํ•˜ํ•™์  ํ˜•์ƒ์„ ์ดํƒˆํ•˜๋Š”์ง€๋ฅผ ํ™•์ธํ•˜๋Š” ๊ฒƒ์„ ์˜๋ฏธํ•œ๋‹ค.

์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์€ [ํ‰๋ฉดํŠธ๋Ÿฌ์Šคํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์˜ โ€˜์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์ž์ฒด์˜ ๊ตฌ์กฐํ•ด์„ ๊ธฐ๋Šฅโ€™์„ ์ด์šฉํ•˜์—ฌ ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ํ•„์š”๋‹จ๋ฉด์ ๊ณผ ๋‹จ๋ฉด๋ ฅ์„ ๊ฒฐ์ •ํ•œ๋‹ค. ์ด๋“ค ์š”์†Œ์˜ ํ•„์š”๋‹จ๋ฉด์  ๊ฒฐ์ • ์‹œ Eq. (1)์˜ ์กฐ๊ฑด์„ ๋งŒ์กฑ์‹œํ‚ฌ ์ˆ˜ ์žˆ๋„๋ก Fig. 8์˜ ๋‹จ์ˆœ ์ตœ์  ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ ๋„์ž…ํ•˜์˜€๋‹ค. ํ”„๋กœ๊ทธ๋žจ์— ์ ‘๋ชฉ์‹œํ‚จ ์•Œ๊ณ ๋ฆฌ์ฆ˜์€ ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ํ•„์š”๋‹จ๋ฉด์ ์ด ์ด๋“ค ์š”์†Œ์˜ ๋‹จ๋ฉด๋ ฅ์— ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ๋ถ€์ •์ • ํŠธ๋Ÿฌ์Šค ๊ตฌ์กฐ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์— ํŠนํžˆ ํšจ๊ณผ์ ์ด๋‹ค.

PIC9B71.gif (1)

Fig. 8.

Algorithm for Determination of Cross-sectional Areas of Struts and Ties

Figure_KSCE_37_03_03_F8.jpg

์—ฌ๊ธฐ์„œ, PIC9B72.gif ๋ฐ PIC9B83.gif๋Š” ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ์„ค๊ณ„๋‹จ๋ฉด๋ ฅ์„, PIC9B93.gif ๋ฐ PIC9BA4.gif๋Š” ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ๊ฐ•๋„๊ฐ์†Œ๊ณ„์ˆ˜๋ฅผ, ๊ทธ๋ฆฌ๊ณ  PIC9BA5.gif ๋ฐ PIC9BA6.gif๋Š” ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ์œ ํšจ๊ฐ•๋„๋ฅผ ๋‚˜ํƒ€๋‚ธ๋‹ค. ํ”„๋กœ๊ทธ๋žจ์˜ โ€˜์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์ž์ฒด์˜ ๊ตฌ์กฐํ•ด์„ ๊ธฐ๋Šฅโ€™์€ ๋น„์„ ํ˜• ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•(Yun, 2000)์„ ์‚ฌ์šฉํ•œ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๋น„์„ ํ˜• ๊ฑฐ๋™ ๋ฐ ๊ฐ•๋„ํ•ด์„๋„ ๊ฐ€๋Šฅํ•˜๊ฒŒ ํ•œ๋‹ค.

์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ํ•„์š”๋‹จ๋ฉด์ ์„ ๊ฒฐ์ •ํ•œ ํ›„ ํ˜•์„ฑํ•œ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์ด ์„ค๊ณ„์— ์ ํ•ฉํ•œ ๋ชจ๋ธ์ธ์ง€ ๊ฒ€์ฆํ•ด์•ผ ํ•œ๋‹ค. ์ฆ‰ ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ๊ณผ ์ ˆ์ ์˜์—ญ์ด ์„ค๊ณ„๋‹จ๋ฉด๋ ฅ์„ ์ „๋‹ฌํ•˜๋Š”๋ฐ ์†Œ์š”๋˜๋Š” ์ถฉ๋ถ„ํ•œ ๊ฐ•๋„๋ฅผ ๋ณด์œ ํ•˜๊ณ  ์žˆ๋Š”์ง€ ๊ฒ€ํ† ํ•ด์•ผ ํ•œ๋‹ค. ์ผ๋ฐ˜์ ์œผ๋กœ ์ŠคํŠธ๋Ÿฟ์˜ ๊ฐ•๋„๋Š” ์ŠคํŠธ๋Ÿฟ์˜ ์ตœ๋Œ€๋‹จ๋ฉด์ ๊ณผ ์ƒ๊ธฐ ๊ธฐ๋Šฅ์œผ๋กœ๋ถ€ํ„ฐ ๊ฒฐ์ •ํ•œ ํ•„์š”๋‹จ๋ฉด์ ์„ ๋น„๊ตํ•˜์—ฌ ๊ฒ€ํ† ํ•œ๋‹ค. ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„๋Š” ์ ˆ์ ์˜์—ญ ๊ฒฝ๊ณ„๋ฉด์—์„œ์˜ ์ตœ๋Œ€๋‹จ๋ฉด์ ๊ณผ ํ•„์š”๋‹จ๋ฉด์ ์„ ๋น„๊ตํ•˜์—ฌ ๊ฒ€ํ† ํ•œ๋‹ค. ์ตœ๋Œ€๋‹จ๋ฉด์ ์˜ ๊ฒฐ์ •์„ ์œ„ํ•ด์„œ๋Š” ๋ชจ๋“  ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ์„ ๋„์‹ํ™”ํ•ด์•ผํ•˜๋Š” ๊ณผ์ •์ด ํ•„์š”ํ•˜๋ฉฐ, ์ด ๊ณผ์ •์€ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์„ค๊ณ„ ์‹œ ๊ฐ€์žฅ ๋งŽ์€ ์‹œ๊ฐ„๊ณผ ๋…ธ๋ ฅ, ๊ทธ๋ฆฌ๊ณ  ์„ค๊ณ„์ž์˜ ์ฃผ๊ด€์ ์ธ ํŒ๋‹จ์„ ํ•„์š”๋กœ ํ•œ๋‹ค. ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ ๊ฒฝ๊ณ„๋ฉด์˜ ์ตœ๋Œ€๋‹จ๋ฉด์ ์€ ์ง€์••ํŒ์˜ ๋ฉด์  ๋ฐ ํ”ผ๋ณต๋‘๊ป˜๋ฅผ ๊ณ ๋ คํ•˜์—ฌ ๊ฒฐ์ •ํ•˜๋Š” ๊ฒƒ์ด ์ผ๋ฐ˜์ ์ด๋‚˜, ์ด ๋ฐฉ๋ฒ•์€ ์ง€์••ํŒ์ด ์žˆ๋Š” ์ ˆ์ ์˜์—ญ๊ณผ ์ด ์ ˆ์ ์˜์—ญ์— ์—ฐ๊ฒฐ๋œ ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ์˜ ๊ฒฝ์šฐ์—๋งŒ ์ผ๊ด€์„ฑ ์žˆ๊ฒŒ ์ ์šฉํ•  ์ˆ˜ ์žˆ๋‹ค. ๊ทธ ์ด์™ธ์˜ ๊ฒฝ์šฐ๋Š” ๊ฐœ๋…์ž์ฒด์˜ ๋ชจํ˜ธ์„ฑ์œผ๋กœ ์ธํ•ด ์„ค๊ณ„์ž์˜ ํŒ๋‹จ์— ๋”ฐ๋ผ ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ, ์ ˆ์ ์˜์—ญ ๊ฒฝ๊ณ„๋ฉด์˜ ์ตœ๋Œ€๋‹จ๋ฉด์ , ์ด์— ๋”ฐ๋ฅธ ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ์˜ ์ตœ๋Œ€๋‹จ๋ฉด์  ๋“ฑ์ด ๋‹ฌ๋ผ์งˆ ์ˆ˜ ์žˆ๋‹ค(ACI 445, 2010; KCI, 2012). ๋”ฐ๋ผ์„œ ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์€ ๋ชจ๋“  ์ŠคํŠธ๋Ÿฟ์˜ ํ•„์š”๋‹จ๋ฉด์ ์„ Eq. (1)์˜ ์ŠคํŠธ๋Ÿฟ ๊ฐ•๋„์กฐ๊ฑด๊ณผ ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„์กฐ๊ฑด์„ ๋งŒ์กฑ์‹œํ‚ค๋Š” ๋ฒ”์œ„์—์„œ ๊ฒฐ์ •ํ•œ ํ›„ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ธฐํ•˜ํ•™์  ์ ํ•ฉ์กฐ๊ฑด์˜ ๋งŒ์กฑ์—ฌ๋ถ€๋ฅผ ์‹œ๊ฐ์ ์œผ๋กœ ๊ฒ€ํ† ํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•˜์˜€๋‹ค. ์ด๋•Œ ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ์€ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์ ˆ์ ์— ์—ฐ๊ฒฐ๋œ ๋ชจ๋“  ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ๋‹จ๋ฉด ์™ธ๊ณฝ์„ ์ด ๋งŒ๋‚˜๋Š” ์ ์„ ์—ฐ๊ฒฐํ•˜์—ฌ ํ˜•์„ฑํ•˜์˜€๋‹ค.

3.6 ๋…๋ฆฝ ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„๊ฒ€ํ† 

๋ชจ๋“  ํ˜•ํƒœ์˜ ์ ˆ์ ์˜์—ญ์ด ์„ธ ๊ฐœ์˜ ์ŠคํŠธ๋Ÿฟ ๋˜๋Š” ํƒ€์ด์— ์˜ํ•ด CCC-, CCT-, CTT-์ ˆ์ ์˜์—ญ์œผ๋กœ ๊ตฌ์„ฑ๋œ๋‹ค๊ณ  ๊ฐ€์ •ํ•œ ํ›„ ์ ˆ์ ์˜์—ญ ๊ฒฝ๊ณ„๋ฉด์˜ ํ•„์š”๋‹จ๋ฉด์  ๋ฐ ์ตœ๋Œ€๋‹จ๋ฉด์ ์˜ ๋น„๊ต๋ฅผ ํ†ตํ•ด ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„์กฐ๊ฑด์„ ๊ฒ€ํ† ํ•˜๋Š” ํ˜„ํ–‰ ์„ค๊ณ„๊ธฐ์ค€์„œ์˜ ๋ฐฉ๋ฒ•์€ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์˜ ์‹ค๋ฌด์ ์šฉ ์ธก๋ฉด์—์„œ ์žฅ์ ์ด ์žˆ์œผ๋‚˜, ์ ˆ์ ์˜์—ญ์˜ ์‹ค์ œ ํŒŒ๊ดด๊ฑฐ๋™ ๋ฐ ๊ฐ•๋„ํŠน์„ฑ์„ ์‹ค์ œ ์„ค๊ณ„ ์‹œ ์ ์ ˆํ•˜๊ฒŒ ๋ฐ˜์˜ํ•  ์ˆ˜ ์—†๋‹ค. ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„์— ๊ด€ํ•œ ์—ฐ๊ตฌ๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ์˜ ์œ ํšจ๊ฐ•๋„์— ๊ด€ํ•œ ๊ฒƒ์— ๋น„ํ•ด ์ƒ๋Œ€์ ์œผ๋กœ ๋ฏธ๋ฏธํ•œ๋ฐ, ์ด๋Š” ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ์ด ๋งค์šฐ ๋‹ค์–‘ํ•˜๋ฉฐ ์ ˆ์ ์˜์—ญ์ด ์œ„์น˜ ๋ฐ ์ ˆ์ ์˜์—ญ์— ์ •์ฐฉ๋˜๋Š” ์ฒ ๊ทผ์˜ ๋ฐฐ์น˜ํ˜•ํƒœ์— ๋”ฐ๋ผ ์ ˆ์ ์˜์—ญ์˜ ๊ฑฐ๋™ ๋ฐ ๊ฐ•๋„ ํŠน์„ฑ์ด ๋งค์šฐ ์ƒ์ดํ•˜๊ธฐ ๋•Œ๋ฌธ์ด๋‹ค.

ํ˜„ํ–‰ ์„ค๊ณ„๊ธฐ์ค€์„œ์˜ ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„๊ฒ€ํ†  ๋ฐฉ๋ฒ•์— ๋Œ€ํ•œ ๋‹จ์ ์„ ๊ฐœ์„ ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ Yun (2006)์€ ์ ˆ์ ์˜์—ญ์— ๋Œ€ํ•œ ๋น„ํƒ„์„ฑ ์œ ํ•œ์š”์†Œํ•ด์„์„ ์ˆ˜ํ–‰ํ•˜๊ณ  ์ ˆ์ ์˜์—ญ ๋‚ด๋ถ€์˜ ํŒŒ๊ดด๋ฉ”์ปค๋‹ˆ์ฆ˜์˜ ๋ฐœ์ƒ์—ฌ๋ถ€๋ฅผ ํ™•์ธํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ œ์•ˆํ•˜์˜€๋‹ค. ๊ทธ์˜ ๋ฐฉ๋ฒ•์€ ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ์„ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์ ˆ์ ์— ์—ฐ๊ฒฐ๋œ ๋ชจ๋“  ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ๋‹จ๋ฉด ์™ธ๊ณฝ์„ ์ด ๋งŒ๋‚˜๋Š” ์ ์„ ์—ฐ๊ฒฐํ•˜์—ฌ ๊ฒฐ์ •ํ•˜๋ฉฐ, ๋น„ํƒ„์„ฑ ์œ ํ•œ์š”์†Œํ•ด์„์„ ์œ„ํ•ด ์ฒ ๊ทผ ํƒ€์ด ๋˜๋Š” ์ฒ ๊ทผ ์ŠคํŠธ๋Ÿฟ์˜ ๋‹จ๋ฉด๋ ฅ์— ์˜ํ•œ ํ•˜์ค‘์กฐ๊ฑด์„ ์ฒ ๊ทผ์˜ ๋ฐฐ์น˜ํ˜•ํƒœ, ์ •์ฐฉ๋ฐฉ๋ฒ•, ์ •์ฐฉ๊ธธ์ด, ์ฒ ๊ทผ์— ์˜ํ•œ ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ๊ตฌ์†ํšจ๊ณผ ๋“ฑ์„ ๊ณ ๋ คํ•˜์—ฌ ๊ฒฐ์ •ํ•œ๋‹ค. Fig. 9๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ฒ ๊ทผ ํƒ€์ด์˜ ์ธ์žฅ๋ ฅ์„ ์ ˆ์ ์˜์—ญ ์œ ํ•œ์š”์†Œ๋ชจ๋ธ์˜ ์ ˆ์ ๋ ฅ์œผ๋กœ ์น˜ํ™˜ํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ๋ณด์ธ ๊ฒƒ์ด๋‹ค. ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์€ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๋ชจ๋“  ์ ˆ์ ์˜์—ญ์„ ๋…๋ฆฝ ์ ˆ์ ์˜์—ญ์œผ๋กœ ๊ฐ„์ฃผํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ํ•œ ์ ˆ์ ์˜์—ญ์„ ์„ ํƒํ•œ ํ›„ [ํ‰๋ฉด๊ณ ์ฒดํ•ด์„] ๋ฉ”๋‰ด์‹œ์Šคํ…œ์˜ ๊ธฐ๋Šฅ์„ ์ด์šฉํ•˜์—ฌ ์ ˆ์ ์˜์—ญ์˜ ์œ ํ•œ์š”์†Œ ๋ฐ ์ ˆ์  ๋ฒˆํ˜ธ๋ฅผ ์ƒ์„ฑํ•˜๊ณ  ์ฒ ๊ทผ์˜ ์ •์ฐฉ๋ฐฉ๋ฒ•์„ ๋Œ€ํ™”์ฐฝ์„ ํ†ตํ•ด ์„ ํƒํ•˜์—ฌ ์ž…๋ ฅํ•˜๋ฉด Yun (2006)์˜ ๋ฐฉ๋ฒ•์— ์˜ํ•ด ์ฆ๋ถ„ํ•˜์ค‘ ๋‹จ๊ณ„์— ๋”ฐ๋ฅธ ์ ˆ์ ์˜์—ญ์—์„œ์˜ ๊ท ์—ด์ง„์ „ ์ƒํƒœ, ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ํŒŒ์‡ ์—ฌ๋ถ€, ๊ทธ๋ฆฌ๊ณ  ํŒŒ๊ดด๋ฉ”์ปค๋‹ˆ์ฆ˜์˜ ๋ฐœ์ƒ์—ฌ๋ถ€ ๋“ฑ์„ ์‹œ๊ฐํ™”ํ•˜์—ฌ ์ž๋™์ ์œผ๋กœ ๊ฒ€ํ† ํ•  ์ˆ˜ ์žˆ๋‹ค. Fig. 10์€ Bouadi (1989)์— ์˜ํ•ด ํŒŒ๊ดด์‹คํ—˜์ด ์ˆ˜ํ–‰๋œ 10๊ฐœ์˜ CCT ๋…๋ฆฝ์ ˆ์ ์˜์—ญ ์ค‘ LFT-R ๋…๋ฆฝ์ ˆ์ ์˜์—ญ์˜ ํŒŒ๊ดด๊ฐ•๋„๋ฅผ ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์„ ์ด์šฉํ•˜์—ฌ ํ‰๊ฐ€ํ•œ ๊ฒฐ๊ณผ๋ฅผ ๋ณด์ธ ๊ฒƒ์ด๋‹ค. Fig. 10(b)์—์„œ ๊ฒ€์€์ƒ‰ ๋ฐ”ํƒ•์— ํ•˜์–€ ์ ์œผ๋กœ ํ‘œ์‹œํ•œ ์œ ํ•œ์š”์†Œ์˜ ์‘๋ ฅ์ƒํƒœ๋Š” ์ตœ๋Œ€ ์••์ถ•์ฃผ์‘๋ ฅ์ด ํŒŒ๊ดดํฌ๋ฝ์„  ์‘๋ ฅ์— ๋„๋‹ฌํ•œ 2๋ฐฉํ–ฅ ์••์ถ•์ƒํƒœ์ด๋ฉฐ, ๊ฒ€์€ ๋ฐ”ํƒ•์— ํ•˜์–€ ์„ ์œผ๋กœ ํ‘œ์‹œํ•œ ์œ ํ•œ์š”์†Œ์˜ ์‘๋ ฅ์ƒํƒœ๋Š” ์ตœ๋Œ€ ์••์ถ•์ฃผ์‘๋ ฅ์ด ์ฝ˜ํฌ๋ฆฌํŠธ์˜ ์••์ถ•๊ฐ•๋„์— ๋„๋‹ฌํ•œ 2๋ฐฉํ–ฅ ์••์ถ•-์ธ์žฅ ์‘๋ ฅ์ƒํƒœ์ด๋‹ค. ๋น„ํƒ„์„ฑ ์œ ํ•œ์š”์†Œํ•ด์„์„ ํ†ตํ•œ ์ ˆ์ ์˜์—ญ ๊ฐ•๋„๊ฒ€ํ†  ๋ฐฉ๋ฒ•์€ ์‹คํ—˜ ์‹œ์˜ ์ ˆ์ ์˜์—ญ์˜ ํŒŒ๊ดด๋ชจ๋“œ๋ฟ ์•„๋‹ˆ๋ผ ํŒŒ๊ดด๊ฐ•๋„๋ฅผ ์ •ํ™•ํžˆ ํ‰๊ฐ€ํ•  ์ˆ˜ ์žˆ์Œ์„ ์•Œ ์ˆ˜ ์žˆ๋‹ค.

Fig. 9.

Imposition of Finite Element Forces on Nodal Zones

Figure_KSCE_37_03_03_F9.jpg
Fig. 10.

Finite Element Inelastic Analysis of Isolated Nodal Zone LFT-R (Adapted from Yun, 2006)

Figure_KSCE_37_03_03_F10.jpg

4. ๋‚ดํ•˜๋ ฅ ๊ฒ€ํ† ๋ฅผ ํ†ตํ•œ ์ ์šฉ์„ฑ ๊ฒ€์ฆ

์ง€๊ธˆ๊นŒ์ง€ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์„ ์‹ค์šฉ์ ์œผ๋กœ ํ™œ์šฉํ•˜๊ธฐ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ๊ณผ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์„ค๊ณ„๋ฅผ ์ •ํ™•ํ•˜๊ณ  ํ•ฉ๋ฆฌ์ ์œผ๋กœ ์ˆ˜ํ–‰ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์ฒ ๊ทผ ์˜ํ–ฅ์˜ ๊ณ ๋ ค, ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ ์œ ํšจ๊ฐ•๋„ ๊ฒฐ์ •, ์ŠคํŠธ๋Ÿฟ๊ณผ ํƒ€์ด์˜ ๊ฐ•์„ฑ๊ฒฐ์ • ๋“ฑ๊ณผ ๊ด€๋ จํ•œ ์„ธ๋ถ€๊ธฐ๋Šฅ ๋“ฑ์„ ์ค‘์ ์ ์œผ๋กœ ์†Œ๊ฐœํ•˜์˜€๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ํ”„๋กœ๊ทธ๋žจ ์ž์ฒด์˜ ์„ฑ๋Šฅ์„ ๊ฒ€์ฆํ•  ์ˆ˜ ์žˆ๋Š” ์‹คํ—˜๊ฒฐ๊ณผ์™€์˜ ๋น„๊ต์ž๋ฃŒ๋Š” 3.6์ ˆ์˜ ๋น„์„ ํ˜•์ ์ธ ๋ฐฉ๋ฒ•์— ์˜ํ•œ ๋…๋ฆฝ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„๊ฒ€ํ†  ์ด์™ธ์—๋Š” ํฌํ•จ๋˜์–ด์žˆ์ง€ ์•Š๋‹ค. ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์„ ์ด์šฉํ•œ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๋‚ดํ•˜๋ ฅ์€ ์„ ์ •๋œ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ๊ตฌ์„ฑ์š”์†Œ์ธ ์ŠคํŠธ๋Ÿฟ, ํƒ€์ด, ๊ทธ๋ฆฌ๊ณ  ์ ˆ์ ์˜์—ญ ๋“ฑ์˜ ๊ฐ•๋„๋ฅผ ์ข…ํ•ฉ์ ์œผ๋กœ ๊ฒ€ํ† ํ•˜์—ฌ ํ‰๊ฐ€ํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ๋˜ํ•œ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์ž์ฒด์˜ ์•ˆ์ •์„ฑ์„ ๊ฒ€ํ† ํ•˜์—ฌ ํ‰๊ฐ€ํ•  ์ˆ˜๋„ ์žˆ๋‹ค. ์ด ๋…ผ๋ฌธ์˜ ํ”„๋กœ๊ทธ๋žจ ๋ฐ ์ด ํ”„๋กœ๊ทธ๋žจ์˜ ์ดˆ๊ธฐ๋ฒ„์ „์„ ์‚ฌ์šฉํ•˜์—ฌ ํŒŒ๊ดด์‹คํ—˜์ด ์ˆ˜ํ–‰๋œ ๋‹ค์ˆ˜์˜ ์ฒ ๊ทผ ๋ฐ ํ”„๋ฆฌ์ŠคํŠธ๋ ˆ์ŠคํŠธ ์ฝ˜ํฌ๋ฆฌํŠธ ๊นŠ์€ ๋ณด, ํŒจ๋„, ์ฝ”๋ฒจ, ํ„ฑ์ด์ง„ ๋ณด, ํฌ์ŠคํŠธํ…์…˜ ๋ณด์˜ ์ •์ฐฉ๋ถ€ ๋“ฑ์„ ํฌํ•จํ•œ ์—ฌ๋Ÿฌ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๋‚ดํ•˜๋ ฅ์ด ๊ฒ€ํ† ๋˜์—ˆ์œผ๋ฉฐ(Yun, 2000, 2002, 2003, 2005; Yun et al., 2007; Jeon and Yun, 2010), ๋˜ํ•œ ์ฒ ๊ทผ์ฝ˜ํฌ๋ฆฌํŠธ ๊นŠ์€ ๋ณด, ํ„ฑ์ธ์ง„ Tํ˜• ๋ณด, Tํ˜• ๊ต๊ฐ์ฝ”ํ•‘๋ถ€, ใ… ํ˜• ๊ต๊ฐ์ฝ”ํ•‘๋ถ€, ์˜น๋ฒฝ, ๋ง๋š์ง€์ง€ ๋…๋ฆฝ๊ธฐ์ดˆ, ์•”๋ฐ˜์ง€์ง€ ๋…๋ฆฝ๊ธฐ์ดˆ, ๊ต๋Œ€๊ธฐ์ดˆ ๋“ฑ์˜ ์„ค๊ณ„์— ํ™œ์šฉ๋˜์—ˆ๋‹ค(KCI, 2012). ๋”ฐ๋ผ์„œ ๊ธฐ์กด ์—ฐ๊ตฌ์˜ ๊ฒฐ๊ณผ๋กœ ๋ฏธ๋ฃจ์–ด๋ณผ ๋•Œ ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์— ๋‚ดํฌ๋œ ๊ตฌ์กฐํ•ด์„๊ธฐ๋Šฅ, ์œ ํšจ๊ฐ•๋„ ๊ฒฐ์ •๊ธฐ๋Šฅ, ํ•˜์ค‘์ „๋‹ฌ๋Šฅ๋ ฅ ๊ฒฐ์ •๊ธฐ๋Šฅ, ์ ˆ์ ์˜์—ญ์˜ ์ •๋ฐ€๊ฐ•๋„ ๊ฒ€ํ† ๊ธฐ๋Šฅ ๋“ฑ์€ ํฐ ๋ฌธ์ œ๊ฐ€ ์—†๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

5. ๊ฒฐ ๋ก 

์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ ๋ฐ ๊ตฌ์กฐ๋ฌผ์˜ ์ „ ์˜์—ญ์— ๊ฑธ์นœ ์„ค๊ณ„๋ฅผ ํ–ฅ์ƒ์‹œํ‚ค๋Š” ๊ฒƒ์œผ๋กœ์„œ, ์—ฌ๋Ÿฌ ๋ณต์žกํ•œ ํ•˜์ค‘์กฐ๊ฑด ๋ฐ ๊ธฐํ•˜ํ•™์  ํ˜•์ƒ์„ ๊ฐ–๋Š” ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ ๋ฐ ๊ตฌ์กฐ๋ฌผ์˜ ์„ค๊ณ„์— ํšจ๊ณผ์ ์ด๋ผ๊ณ  ์•Œ๋ ค์ ธ ์žˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์— ์˜ํ•œ ์„ค๊ณ„๊ณผ์ •์€ ๋ฐ˜๋ณต์ ์ธ ์ˆ˜์น˜ํ•ด์„๊ณผ์ •, ๋งŽ์€ ์–‘์˜ ๋„์‹์  ๊ณ„์‚ฐ๊ณผ์ •, ์—„์ฒญ๋‚œ ์‹œ๊ฐ„๊ณผ ๋…ธ๋ ฅ, ๊ทธ๋ฆฌ๊ณ  ์—ฌ๋Ÿฌ ๋‹จ๊ณ„์—์„œ์˜ ์„ค๊ณ„์ž์˜ ์ฃผ๊ด€์ ์ธ ํŒ๋‹จ ๋“ฑ์„ ํ•„์š”๋กœ ํ•˜๋ฉฐ, ์ด๋Š” ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์˜ ์‹ค๋ฌด์ ์šฉ์„ ์ €ํ•ดํ•˜๋Š” ์ฃผ๋œ ์›์ธ์ด๋‹ค. ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ•์˜ ๋‹จ์ ์„ ๊ฐœ์„ ํ•˜๊ธฐ ์œ„ํ•ด ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์˜ ๊ฐœ๋ฐœ์— ๊ด€ํ•œ ๋ช‡๋ช‡ ์—ฐ๊ตฌ๊ฐ€ ์ˆ˜ํ–‰๋˜์—ˆ์œผ๋‚˜, ๊ทธ ์—ฐ๊ตฌ๊ฒฐ๊ณผ๋Š” ์„œ๋ก ์—์„œ ์–ธ๊ธ‰ํ•œ๋ฐ”์™€ ๊ฐ™์ด ์ˆ˜์น˜ํ•ด์„ ๋ฐ ๊ทธ๋ž˜ํ”ฝ ๊ธฐ๋Šฅ ์ธก๋ฉด์—์„œ ๋ถ€์กฑํ•œ ๋ถ€๋ถ„์ด ๋งŽ๋‹ค.

์ด ์—ฐ๊ตฌ์—์„œ๋Š” ์„ ํ–‰์—ฐ๊ตฌ์˜ ๋‹จ์  ๋ฐ ํ•œ๊ณ„๋ฅผ ๊ทน๋ณตํ•˜์—ฌ PC ์œˆ๋„์šฐ ์‹œ์Šคํ…œ์—์„œ ๋ชจ๋“  ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„ ๋ฐ ์„ค๊ณ„๋ฅผ ์ „๋ฌธ์ ์ด๊ณ  ํšจ์œจ์ ์œผ๋กœ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๋Š” ์ปดํ“จํ„ฐ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์„ ๊ฐœ๋ฐœ, ์ œ์•ˆํ•˜์˜€๋‹ค. ๊ฐœ๋ฐœํ•œ ๊ทธ๋ž˜ํ”ฝ ํ”„๋กœ๊ทธ๋žจ์€ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ๋ชจ๋ธ๋ง ๋ฐ ํ•ด์„/์„ค๊ณ„ ๊ฒฐ๊ณผ๋ฅผ ๊ทธ๋ž˜ํ”ฝ์œผ๋กœ ์ œ๊ณตํ•˜๋Š” ์œ ์ €์ธํ„ฐํŽ˜์ด์Šค๋ฅผ ๊ฐ–๊ณ  ์žˆ์œผ๋ฉฐ, ๋ชจ๋“  ์ข…๋ฅ˜์˜ ๊ฒฝ๊ณ„์กฐ๊ฑด์„ ์†Œํ™”ํ•  ์ˆ˜ ์žˆ๋Š” ํ‰๋ฉด๊ณ ์ฒด ๋ฐ ํ‰๋ฉดํŠธ๋Ÿฌ์Šค์˜ ์„ ํ˜• ๋ฐ ์žฌ๋ฃŒ๋น„์„ ํ˜• ํ•ด์„์„ ์œ„ํ•œ ์œ ํ•œ์š”์†Œํ•ด์„ ํ”„๋กœ๊ทธ๋žจ, ๋ถ€์ •์ • ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ์˜ ์ŠคํŠธ๋Ÿฟ ๋ฐ ํƒ€์ด์˜ ์ถ•๊ฐ•์„ฑ ๊ฒฐ์ •์„ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ, ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ž์ค‘ ๋ฐ ์ฒ ๊ทผ์˜ ์˜ํ–ฅ์„ ์ž๋™์ ์œผ๋กœ ๋ฐ˜์˜ํ•˜๊ธฐ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ, ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ์œ ํšจ๊ฐ•๋„๋ฅผ ์ž๋™์ ์œผ๋กœ ๊ฒฐ์ •ํ•˜๊ธฐ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ, ๋‹ค์–‘ํ•œ ํ˜•ํƒœ์˜ ์ŠคํŠธ๋Ÿฟ ๋ฐ ์ ˆ์ ์˜์—ญ์˜ ํ˜•์ƒ์„ ๊ฒฐ์ •ํ•˜๊ธฐ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ, ์ ˆ์ ์˜์—ญ์˜ ๊ฐ•๋„๋ฅผ ์ •๋ฐ€ํ•˜๊ฒŒ ๊ฒ€ํ† ํ•˜๊ธฐ ์œ„ํ•œ ํ”„๋กœ๊ทธ๋žจ ๋“ฑ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„ ๋˜๋Š” ์„ค๊ณ„๊ณผ์ • ์ƒ ํ•„์š”ํ•œ ๋ชจ๋“  ํ”„๋กœ๊ทธ๋žจ์„ ํƒ‘์žฌํ•˜๊ณ  ์žˆ๋‹ค. ๋น„๋ก ์ด ์—ฐ๊ตฌ์˜ ํ”„๋กœ๊ทธ๋žจ์ด ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ์„ค๊ณ„๋ฅผ ์œ„ํ•œ ํšจ์œจ์„ฑ๊ณผ ํŽธ์˜์„ฑ์ด ๋›ฐ์–ด๋‚œ ๊ทธ๋ž˜ํ”ฝ ํ™˜๊ฒฝ์„ ์ ‘๋ชฉ์‹œํ‚จ ๋‹ค์–‘ํ•œ ๊ธฐ๋Šฅ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋”๋ผ๋„ ํšจ์œจ์ ์ด๊ณ  ํ•ฉ๋ฆฌ์ ์ธ ์ฝ˜ํฌ๋ฆฌํŠธ ๊ตฌ์กฐ๋ถ€์žฌ์˜ ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ํ•ด์„ ๋ฐ ์„ค๊ณ„๋ฅผ ์œ„ํ•ด์„œ๋Š” ์ŠคํŠธ๋Ÿฟ-ํƒ€์ด ๋ชจ๋ธ ๋ฐฉ๋ฒ• ๋ฐ ์œ ํ•œ์š”์†Œํ•ด์„๋ฒ•์— ๋Œ€ํ•œ ์‚ฌ์šฉ์ž์˜ ์ „๋ฌธ์ ์ธ ์ง€์‹์ด ํ•„์š”ํ•˜๋‹ค.

Acknowledgements

๋ณธ ์—ฐ๊ตฌ๋Š” ๊ตญํ† ๊ตํ†ต๋ถ€ ๊ตญํ† ๊ตํ†ต๊ธฐ์ˆ ์‚ฌ์—…ํ™”์ง€์›์‚ฌ์—…์˜ ์—ฐ๊ตฌ๋น„์ง€์›(16TBIP-C094409-02)์— ์˜ํ•ด ์ˆ˜ํ–‰๋˜์—ˆ์Œ.

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